Check Point Advisories

Internet Explorer Content Advisor Memory Corruption (MS05-020; CVE-2005-0555)

Check Point Reference: CPAI-2005-236
Date Published: 25 Nov 2009
Severity: High
Last Updated: Wednesday 25 November, 2009
Source:
Industry Reference:CVE-2005-0555
Protection Provided by:

Security Gateway
R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description Microsoft Internet Explorer includes a feature called Content Advisor. This feature allows users to rate the appropriateness of Web content and to control which web sites can be visited by a user. This feature can help to create a more secure environment that protects users from unsuitable content on the Internet. There exists a buffer overflow vulnerability in Microsoft Internet Explorer. The vulnerability is triggered when Internet Explorer processes malformed Content Advisor files. This vulnerability can be exploited to execute arbitrary code on the target system with the privileges of the currently logged in user. In an attack scenario where arbitrary code execution is attempted, the behavior of the target is dependent on the intention of the malicious code. If such an attack is not executed successfully, the vulnerable application may terminate as a result of the attack attempt. Note that a user would need to click through a series of Content Advisor setup windows for the attack to be successful.

Protection Overview

This protection will detect and block attempts to exploit this vulnerability.

In order for the protection to be activated, update your Security Gateway product to the latest IPS update. For information on how to update IPS, go to SBP-2006-05, click on Protection tab and select the version of your choice.

Security Gateway R80 / R77 / R75

  1. In the IPS tab, click Protections and find the Internet Explorer Content Advisor Memory Corruption (MS05-020) protection using the Search tool and Edit the protection's settings.
  2. Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name:  Web Client Enforcement Violation.
Attack Information:  Microsoft Internet Explorer content advisor memory corruption (MS05-020)

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